Container seam and method of making it



Jan. 26, 1932.

C. STOLLBERG CONTAINER SEAN AND METHOD 0F MAKING 1T Filed May 16. v192'? Patented Jan. 26, 1932 UNITED STATES PATENT OFFICEV OHARLES STOLLBERG-,OF YORK, N.y Y., ASSIGNOR '10 AMERICAN GAN COMPANY, 0F NEW YORK, N. YY.,` A CORPORATION OF NEW JERSEY CONTAINER- SEAM AND METHOD F MAKING IT Application med may 1e,

This invention relates in general to a container seam and the method of making it, and has more particular reference to the provision of an end seam between the bottom 'l5 and the side wall o f a can to form an out-4 wardly projecting rolling ring for a can body.

A principal object of the invention is thel provision of a bottom seam for a `can body which' projects to form a rolling ring and to protectv the surface between the top and bottom seams which may be lithographed or provided with a printed label. A further object of the invention is in the provision of a fluid-tight joint by incorporatingtherein a flexible tubular gasket which is collapsed between seamed flanges.

A further important object lof the invention is (in the formation of a seam with a tubular rubber gasket therein, in which the curled flange of the container end extends over the flange of the body and contacts with the outer wall of the body.

Numerous other objects and advantages of the invention-'will be apparent as it is better understood from the following description, which, taken in connection with the accompanying drawings, discloses a preferred embodiment thereof.

In the drawings:

Figure 1 is a side elevation of a complete container constructed in accor-dance with the principles of this invention;

Fig. 2 is a sectional detail view illustrating the relation of the parts before'the seam is made; and v Fig. 3 is a similar detail illustrating the relation of the partsafter the formation of the seam.

This invention comprises a can body 10 having a side Vseam 11 with its upper body edge outwardly crimped or rolled around al reinforcing wire to form a shoulder bead 12 adapted to, engage clamping lugs .13 of a cover 14. v

The bottom edge of the body 10 is first bent outwardly and 'then upwardly to form. a flange 15, the outer wall of which is substantially parallel with the adjacent body wall.

The bottom 16, which is applied tothe body 1.0, has a central inwardly dished por- 1927. serial No. 191,612.

tion 17 with straight walls 18 adapted to engage closely the inner wall of the body 10 and with an outwardly extending liange 19 of which the edge 20' is turned upwardly to inwardly curled portion of the bottom flange' is crimped over the upwardly turned straight vpart of the body iange in imitation of the top seam of the, container, the inwardly turned edge 20 of the bottom flange engaging theouter wall of the can body,- as shown more clearly in Fig. The edge of the body flange 15 is thus crimped inwardly but preferably terminates at a slight distance from the outer wall of the body 10, and the rubber gasket 21 is compressed between the two flanges, forming a gasket which is thin at both compressed edges.

- In crimping the bottom iange in place the adjacent straight wall 1-8 of the bottom and the contacting wall of the body 10 are inclined slightly outward, thus making a firm tight joint. The edge of the bottom flange 19 engages tlie outer wall of the body 10 opposite the contacting straight portions of the body and bottom, and below the'inwardly Adished portion 17 of the bottom. l

makes a Huid-tight joint but the seam projects from the surface of the outer body" wall substantially the same distance as the top seam with the cover applied thereto, thereby providing a pair of rolling rings upon which the filled can body may be rolled and also protecting a label or a lithographed surface on the outer wall of the can body between the -top and bottom seams.

In making the bottom seam it is obvious that the flanged edge of the body'and the flange of the bottom are partially formed and the gasket is applied to the channel of the bottom before the seaming operation is completed and when the bottom Bange is crimped over -the iiexible gasket is compressed and collapsed between the flanges.

l a gasket member arranged between the bottom parts of said'anges, the marginal edges lt is thought that this invention and many of its attendant advantages will be understood from the foregoing description, and it will be apparent that many changes may be made in the form, construction and arrangement of the parts without departing from the spirit and scope of the invention or sacrificing al1 of its material advantages, the form hereinbefore described being merely a preferred embodiment thereof. Y

The combination of a container body having a marginal edge bent outwardly and back ,along the main portion of said body to form a tubular flange, an end closurevhaving a central offset portion dimensioned to t within said body, and having beyond said central portion a tubular flange at its edge containing the tubular flange of the body, said tubular flanges being eccentric to one another, and

of the said flanges of said body and end c10- sure being conjointly bent in substantially to said body to compress said gasket and to form a hollow bead.

' y CHARLES STOLLBERG. 

